import 'dart:math';

import 'package:flutter/material.dart';

class BuildingList extends StatefulWidget {
  BuildingList({super.key, required this.point});

  String point;

  @override
  State<BuildingList> createState() => _RoomListState();
}

class _RoomListState extends State<BuildingList> {
  Map data = {
    "point": "", // 记录小区信息
    "size": 0, // 随机产生楼栋的数量
    "type": "", // 小区的楼栋名称(size>4 单元, size<=4 号楼)
  };


  //随机伪造楼栋信息
  fakeData () {
    // 1.1 随机产生楼栋的数量
    Random random = Random();
    int size = random.nextInt(6) + 2; // 3-8
    // 1.2 确定小区楼栋的名称
    String type = size > 5 ? '单元' : '号楼';
    // 1.3 更新数据
    setState(() {
      data = {
        "point": widget.point,
        "size": size,
        "type": type,
      };
    });
  }

  @override
  void initState() {
    fakeData();
    super.initState();
  }


  @override
  Widget build(BuildContext context) {
    return Scaffold(
        appBar: AppBar(
          title: const Text('选择楼栋'),
        ),
        body: ListView.builder(itemBuilder: (BuildContext context, int index) {
          return Container(
              color: Colors.white,
              padding: const EdgeInsets.all(10),
              child: GestureDetector(
                onTap: (){
                Navigator.pushNamed(context, '/room_list',
                  arguments: {'point': data['point'], 'building': '${index + 1}${data['type']}'});
                },
                child: Row(children: [
                Expanded(
                    child: Text('${data['point']}${index + 1}${data['type']}')),
                const Row(children: [
                  Icon(Icons.arrow_forward_ios, size: 16, color: Colors.black),
                ])
              ]),
              ));
        },
        itemCount: data['size'] ,  
        )
      );
  }
}